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.TU e e h s w B e h S 4 Y E L R A VV n... C. n d 0 M 0 m ELECTRIClDIVINING ROD.

Patented May 8,1883.

(No Model.) 4 Sheets-Sheet 2. C. P. VARLBY.

ELECTRIC DIVINING ROD.

No. 277,087. Patented May 8,1883.

(No Model.) i 4 Sheets-Sheet 3. C. F. VARLEY.

ELECTRIC DIVINING ROD.

Patented May 8, 1883.

(No Model.) 4 Sheets-Sheet 4.

- C. F. VARLEY.

ELECTRIC DIVINING ROD.

Patented May 8,1883.

Fig: 41.

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eRoMwELLF. VARLEY, on BEXLEY HEATH, COUNTY oF KENT, ENGLAND.

sBncIFIcATIoN `forming pm 'ef Letters Patent No. 277,087, dated Mey8,1883.A

. f v .Application tiled August 31, 1882. (No model.) Patented inEngland December 7. 1881, No. 5,353.

To all whom it may concern;

Be it. known that I, GROMWE`LI. FLEET` Woon VARLEY, a subjectof theQueen of Great Britain,residing at Cromwell House, Bexley Heath, in thecounty of Kent, England, have invented certain new and usefulimprovementsin divinng-rods or apparatus by which the existence andposition of 'metallic lodes v may be discovered, and which is alsoapplicable to other useful purposes, (for which .I have received Letters5,353, dated December 7,'188 1,)of which the followingis aspecification.

The object of the invention is'to discover the existence and position ofmetallic lodes by of the ground.

`The apparatus in the form I find mostconvenient consists yof a rod oraxis Iof from one meter to'two`or three in length. Therod is pivotedinto a frame. end twoheliees of twenty to thirty, centimeters indiameter, as indicated in Figure 1 of the drawings annexed. Theplanesofthe rings means of 'observations made upon the surface areparallel with the axis, and the centers of the -two helices areplacedabout one: meter or to a movable coil placed in a magnetic field.

apart, more or less. These helices, are c onnected together by two wirespassing along at aconvenient part of the axis, and attached to twoinsulated semi-cylindrical pieces of metal mounted upon the axis, andagainst which two springs press. This arrangement forms acommutat'or,and the contacts change during the rotation as the planesofthe rings or helices become v'ertical. The axis is. connected by meansof a pulley and cord with a large-wheel carried on the frame whichsupports thepivots, or is otherwise geared so as to permit of itsl beingrapidly rotated.' The 'two springs vof lthe commutator are rconnected toa delicate astatic. galvanometer at a convenient'distance,

At right angles. to the plane of the rodA projects a pointer.` This`-pointer is attached to the frame carrying the rod. The frame is mountedonpivots, so'as to turn in any direction, the stand carrying the framehaving two axes, one horizontal, the othervertical, as in the altazimuthmounting of a telescope. 1f there be an electric earth-current 'passingin Patent in Great/Britain, No.

The rod carries on each' a' straight line of indenite length underneaththe axle, it will produce a magnetic field ldiminishing in power as thedistance from it increases.,I This magnetic field, when cut by thehelices, tends to generate currents in them.

to thelode; but when the rod is suitably placed and the pointer is iuthe direction of the lode the currents are divided half in one directionand half inthe other through the galvanometer,

which returns to zero. yThus if the galvan` ometer is deflected with therod in any posi` tion it shows the presence of a lode. By in cliuing therod until no current is produced the pointer is brought toa position inwhich -it indicates the direction of the lode, and by taking twoobservations, one on' each side of the lode at which the pointer showsan angle,

of forty-five degrees, half the horizontal distance between these twostations, is the distance of the lode beneath thel surface of the earth,supposing the surface -to be level or uniform. T he hollow helicesJateach end ot' the- `rotating bar may/be varied inform, and may bereplaced by two bar electro-magnets.

An instrument with barl electro-magnets is represented bythe Figs. 2,3,and 4. 4 Fig. 2l

is a s'ide elevation, and Fig. 3a front eleva' Y' tion.

scale. l

a is the foot or support. b is a frame carried by it, and capable ofbeing turned around the vertical axis b'. l g L v c is a board havinghorizontal axesor trunnions c c', by which it iscarried in the frame b,and about which the board can be inclined as may be desired. The board.o may thus be Figf4nis a portion of a plan to a larger said to have analtazimuth mounting. d is an `axis capable of` turning in bearings ec,-",xed

also pivots f -f at be put into rapid rotation' by aband whichencrcles'the small on the board,'andit has the ends. vThe axis d canpulley d on the axis, andl alsothe .wheel.g, which, when required, visturned by hand. .v

h' It are the electro-magnets at the two ends asv of the axis d. .Theyare similar to each other,

and each consists of a soft-iron core, which is f perpendicular totheaxis, and is surrounded with coils of silk-covered wires.` The coils are2 l "senese all connected in-one circuit by wires which pass Within theaxis, which is hollow. lThe ends of the Wires are brought out andattached to two semi-cylindrical pieces of metal, i i, which are carriedupon the axis, but insulated t' from it and from each other.v

1c k are two metal springs fixed to the board c, and bearing against themetalpieces it,

These parts form acommutator. The vsprings ic lc are coupled with thegalvanometer, whichl should be delicate and capable of appreciating'iary construction.

small currents..v The galvanometer is of ordi-V l rEhe connection ismade by wirefs-passing along-the board from the springs lc k to one ofthe trunnions c', and to metal rings on this trunnion'.

l lare springs resting on the rings la 7c, and

wires pass direct from them to the galvanometen m is the pointer tixedtothe board. n isa graduateddisk, also xed to the board,

and on whichthe n the aid of -a plummet. v

- Having thus described the natureof my said invention and the manner ofusing the same, -25 .l would have it understood that I claim-'- Thedescribed divining-rod or instrument by which metallic lodes may bediscovered" and their positions determined from 4the ei'ects of theelectric current which naturally'traverses the lode, such instrumentconsisting of a pair of coils or helices ata distance apart, and eitherwith or Without cores, such coils or helices be`` ing connected inopposition -to 'each other through a galvan'ometer or other instrumentby which feeble electric currents .may be appreciated, and beingarranged for simultaneous rotation, substantially as described..

London August 1, 1882.

cnonwntt rtnnrwoon mutui.

. Witnesses:

iclination may be read bly 1r' GHsIs BERKLY HARRIS,

J oHN DEAN, l 4 f Bothof 17 Gracechu/rch Street, London.

